C / C++ / MFC Discussion Boards

Re: How touse OpenDocumentFile from MFC-dll?

Covean10-Nov-09 23:42

10-Nov-09 23:42

This assert just says that the thread, where you called the function OpenDoc..., has no main wnd.
Is this a multi threaded app or is this your main thread?

Greetings
Covean

Re: How touse OpenDocumentFile from MFC-dll?

PrafullaShirke2710-Nov-09 23:58

PrafullaShirke27

10-Nov-09 23:58

This call is not from MainThread.

Re: How touse OpenDocumentFile from MFC-dll?

Covean11-Nov-09 0:05

Covean

11-Nov-09 0:05

Thats exactly your problem. The easiest way to solve this problem is, that you only
call gui functions from within your thread that created the gui.

In general calling gui functions from within a thread that didn't created the gui is not
a good practice and often causes such problems.

The are ways to do this, but its too long ago, that I developed C++. Maybe somebody
can you explain how to do such calls.

Greetings
Covean

[Message Deleted]

ratprita10-Nov-09 21:41

ratprita

10-Nov-09 21:41

[Message Deleted]

Re: polymorphism

Rajesh R Subramanian10-Nov-09 21:44

Rajesh R Subramanian

10-Nov-09 21:44

ratprita wrote:
An array based employee management system.
a.Should have classes like Manager, Engineer to exploit polymorphic features of C++.
b.Should keep information like name, salary etc. Designation should not be kept as a member. It should be printed polymorphically.
c.Should be a console application
d.Should display a list of options when starting the program. Options are Add, List, Search, Delete and Quit etc and implement those features.

Which one of that exactly are you having trouble with?

“Follow your bliss.” – Joseph Campbell

[Message Deleted]

ratprita10-Nov-09 21:46

ratprita

10-Nov-09 21:46

[Message Deleted]

Re: polymorphism

Rajesh R Subramanian10-Nov-09 21:49

Rajesh R Subramanian

10-Nov-09 21:49

ratprita wrote:
i need a sample program, which satisfies these conditions.

In other words, you want your homework done? No, we don't do that here.

Point #2 from the guidelines[^]: Be specific! Don't ask "can someone send me the code to create an application that does 'X'. Pinpoint exactly what it is you need help with.

“Follow your bliss.” – Joseph Campbell

Re: polymorphism

CPallini10-Nov-09 22:08

CPallini

10-Nov-09 22:08

You may ask your teacher for... Roll eyes | :rolleyes:

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: polymorphism

Cedric Moonen10-Nov-09 23:02

Cedric Moonen

10-Nov-09 23:02

ratprita wrote:
i need a sample program, which satisfies these conditions.

What about writing one, as you are supposed to do ?

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Re: polymorphism

David Crow11-Nov-09 3:38

David Crow

11-Nov-09 3:38

ratprita wrote:
a.Should have classes like Manager, Engineer to exploit polymorphic features of C++.

Here ya go:

class Employee
{
};

class Manager : public Employee
{
};

class Engineer : public Employee
{
};

I'll let you fill in the blanks!

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

AddString() in ListBox

Anu_Bala10-Nov-09 20:20

Anu_Bala

10-Nov-09 20:20

I one of my sample applcaiton,I hav changed the combobox in to Listbox,
After that i got in piece of code.

CAlarmCombo *pSysBox = (CAlarmCombo *)((CMainFrame *)AfxGetMainWnd())->m_SysWnd.GetDlgItem(IDC_SYSALARM);
if(pSysBox)
{
pSysBox->EnableWindow(TRUE);
if( pSysBox->GetCount() < 5 )
pSysBox->AddString((LPCTSTR)RGB(255,0,0));
}
The code is working fine with CComboBox.

The error comes in that bolded line as some USER32.dll unhandled exception.

Anu

Re: AddString() in ListBox

«_Superman_»10-Nov-09 20:24

«_Superman_»

10-Nov-09 20:24

What is the string you're trying to add?
RGB(255, 0, 0) is not a valid string.
pSysBox->AddString(_T("RED")); would be the correct way to do this.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Re: AddString() in ListBox

KingsGambit10-Nov-09 20:27

KingsGambit

10-Nov-09 20:27

You are trying to type cast RGB(255, 0, 0) to a string. This casting is wrong. What are you trying to display on the list?

Re: AddString() in ListBox

CPallini10-Nov-09 20:32

CPallini

10-Nov-09 20:32

Anu_Bala wrote:
pSysBox->AddString((LPCTSTR)RGB(255,0,0));

What do you want to do?
Smile | :)

Re: AddString() in ListBox

Anu_Bala10-Nov-09 21:04

Anu_Bala

10-Nov-09 21:04

Actually it displaying kind of test like

BT001 BTcomments LL

Like this it will print in the COmboBOx.
What i did is..I want ListBox,so replaced the combobox with ListBox,and i use the ID of Combobox in to Listbox.
But with the ComBoBOx it works fine.

The string gets added in function
void CAlarmCombo::DrawItem(LPDRAWITEMSTRUCT lpDIS)
{
.
.
.
CString sAlrm = _T("");
sAlrm.Format("%-16s %-25s %-4s",pTagBase->GetTagName(),pTagBase->GetDescription(),pAlrmDisp->sStatus);
pDC->TextOut(25,lpDIS->rcItem.top + 1,sAlrm)
}

Even i couldnot understand what that AddString() doing.
But how it works perfect in using COmboBox.

Anu

Re: AddString() in ListBox

CPallini10-Nov-09 21:25

CPallini

10-Nov-09 21:25

In the expression

pSysBox->AddString((LPCTSTR)RGB(255,0,0));

You're casting to a const TCHAR * a temporary DWORD value, that plainly makes no sense...
Smile | :)

Re: AddString() in ListBox

Rajesh R Subramanian10-Nov-09 21:01

Rajesh R Subramanian

10-Nov-09 21:01

Anu_Bala wrote:
pSysBox->AddString((LPCTSTR)RGB(255,0,0));

The RGB[^] macro returns a COLORREF[^]. You're forcing the compiler away from complaining about this by cleverly casting the COLORREF value to an LPCTSTR. Roll eyes | :rolleyes:

If you want to add the string as it is, then try

pSysBox->AddString(_T("RGB(255,0,0)"));

“Follow your bliss.” – Joseph Campbell

Re: AddString() in ListBox

David Crow11-Nov-09 3:40

David Crow

11-Nov-09 3:40

Anu_Bala wrote:
CAlarmCombo *pSysBox = (CAlarmCombo *)((CMainFrame *)AfxGetMainWnd())->m_SysWnd.GetDlgItem(IDC_SYSALARM);

What a mess!

Anu_Bala wrote:
pSysBox->AddString((LPCTSTR)RGB(255,0,0));

Do you know what an RGB value is? Hint: it can't be converted to a LPCTSTR by casting it.

New Virtual Desktop

amitkgupta2810-Nov-09 20:11

amitkgupta28

10-Nov-09 20:11

How can I create a virtual desktop, where I can show icons of desktop folder and also show a web page as active desktop.

Thanks,
Amit

Re: New Virtual Desktop

«_Superman_»10-Nov-09 20:21

«_Superman_»

10-Nov-09 20:21

What do you mean by a Virtual Desktop?
You can create another desktop using CreateDesktop[^].

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Broke CString

Paulraj G10-Nov-09 19:23

Paulraj G

10-Nov-09 19:23

Hi...

I am having the following code snap.

CString str = "this is a test program to broke cstring";

Now i need only upto "this is a te".

how to separate it?

G.Paulraj

Re: Broke CString

«_Superman_»10-Nov-09 19:37

«_Superman_»

10-Nov-09 19:37

CString str2 = str.Left(12);

Or

str.Delete(12, 0x7FFF);

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Re: Broke CString

Paulraj G10-Nov-09 20:19

Paulraj G

10-Nov-09 20:19

Thanks....

G.Paulraj

ActiveX Control - Visual C++ 6.0 to Visual Studio 2008 (C++ ) - Urgent

ERLN10-Nov-09 18:33

ERLN

10-Nov-09 18:33

In Visual C++ 6.0 I have two ActiveX control project. One ActiveX control is dependent on another ActiveX control. For that First Project is compiled succesfully and then in second project we used Project->Add To Project->Components and Controls-> then point to compiled first project ActiveX control.
Then It will insert .h and .cpp files to Second Project.

The same how to do in Visual Studio 2008. Please help regarding this

Edit the maximize box

Anu_Bala10-Nov-09 18:16

Anu_Bala

10-Nov-09 18:16

Hi,
Iam displaying child views as seperate window.When i maximize the view,it maximized up to top mainframe. But i want this: when i press the maximize button,the view should maximized up to the toolbar.Like the childwindow minimize,maximize button should appear below the toolbar.
How can i do this?Pls help me.

Anu

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